And leukoplakia specifically relates to a white plaque with no clear underlying cause.

口腔黏膜白斑特指没有明确诱因的白色斑块。

That's where it's good to look for early lesions which are often red or white plaques with an unknown cause.

这会便于发现早期病变，病损通常是不明原因导致的红色或白色斑块。

The diagnosis of multiple sclerosis is supported by an MRI which shows multiple central nervous system lesions, called white matter plaques, since these regions tend to have lots of myelin.

诊断多发性硬化需要MRI的支持，显示多发的中枢神经系统损伤（白质斑），因为该处有大量髓鞘。